Details
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Bug
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Resolution: Done
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Major
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2.0.0.CR6
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None
Description
For a while we've seen rare failures of JMX tests that look like this:
java.lang.RuntimeException: java.security.PrivilegedActionException: javax.management.ListenerNotFoundException: Unknown listener
at org.jboss.as.jmx.rbac.JmxRbacTestCase.checkMBeanAccess(JmxRbacTestCase.java:484)
at org.jboss.as.jmx.rbac.JmxRbacTestCase.testMonitorNonSensitiveMBeans(JmxRbacTestCase.java:219)
...
Caused by: java.security.PrivilegedActionException: null
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.jboss.as.jmx.rbac.JmxRbacTestCase.checkMBeanAccess(JmxRbacTestCase.java:254)
at org.jboss.as.jmx.rbac.JmxRbacTestCase.testMonitorNonSensitiveMBeans(JmxRbacTestCase.java:219)
...
Caused by: javax.management.ListenerNotFoundException: Unknown listener
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.removeNotificationListener(DefaultMBeanServerInterceptor.java:1339)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.removeNotificationListener(DefaultMBeanServerInterceptor.java:1242)
at com.sun.jmx.mbeanserver.JmxMBeanServer.removeNotificationListener(JmxMBeanServer.java:870)
at org.jboss.as.jmx.PluggableMBeanServerImpl$TcclMBeanServer.removeNotificationListener(PluggableMBeanServerImpl.java:1544)
at org.jboss.as.jmx.PluggableMBeanServerImpl.removeNotificationListener(PluggableMBeanServerImpl.java:969)
at org.jboss.as.jmx.rbac.JmxRbacTestCase$1.run(JmxRbacTestCase.java:368)
at org.jboss.as.jmx.rbac.JmxRbacTestCase$1.run(JmxRbacTestCase.java:254)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.jboss.as.jmx.rbac.JmxRbacTestCase.checkMBeanAccess(JmxRbacTestCase.java:254)
at org.jboss.as.jmx.rbac.JmxRbacTestCase.testMonitorNonSensitiveMBeans(JmxRbacTestCase.java:219)
The problem is the TestModelMBean used by the test is not holding a ref to the "listenerWrapper" that the JVM MBeanServer passes into its addNotificationListener method. That allows that listenerWrapper to be gc'd, resulting in the failure of the removeNotificationListener call on the next line of the test.
The test holding a ref to the listener doesn't matter, as it's a "listenerWrapper" object that matters.
